TY  - JOUR
AU  - Ray Redheffer
AU  - Roger Dell
TI  - Sharp Lower Bounds for Solutions on Nonlinear Differential Inequalities.
JO  - Mathematische Zeitschrift
PY  - 1972
SP  - 199
EP  - 216
VL  - 127
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MZ_1972__127_171768/
ID  - MZ_1972__127_171768
ER  -